Selecting and designing a Uninterruptible Power Supply (UPS) consists of eight steps. These steps are: determining the need
for an UPS, determining the purpose(s) of the UPS, determining the power requirements,
selecting the type of UPS, determining if the safety of the selected UPS is acceptable,
determining if the availability of the selected UPS is acceptable, determining if the selected UPS
is maintainable, and determining if the selected Uninterruptible Power Supply UPS is affordable. The last four steps may
require repeating if the UPS does not meet all of the requirements. This process does not and
cannot provide a “cookbook solution.” Each facility has unique requirements for emergency and
standby power. These requirements include the reliability of the prime power source, the nature
of the work done, local and state regulations governing emergency power, etc. The process does
not give a single solution that is applicable to all cases.